using System;
using Microsoft.Practices.RecipeFramework.Library;
using VSSDKAssist.Assets.ValueProviders.Base;

namespace VSSDKAssist.Recipes.CreateCustomProject
{
    public class CustomProjectNotExistsValueProvider : ValueProviderBase
    {
        #region Constants
        private const string ProjectName = "ProjectName";
        #endregion

        #region Fields
        private string projectName;
        #endregion

        /// <summary>
        /// Contains code that will be called when recipe execution begins. This is the first method in the lifecycle.
        /// </summary>
        /// <param name="currentValue">An <see cref="T:System.Object"/> that contains the current value of the argument.</param>
        /// <param name="newValue">When this method returns, contains an <see cref="T:System.Object"/> that contains
        /// the new value of the argument, if the returned value
        /// of the method is <see langword="true"/>. Otherwise, it is ignored.</param>
        /// <returns>
        /// 	<see langword="true"/> if the argument value should be replaced with
        /// the value in <paramref name="newValue"/>; otherwise, <see langword="false"/>.
        /// </returns>
        /// <remarks>By default, always returns <see langword="false"/>, unless overriden by a derived class.</remarks>
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Globalization", "CA1305:SpecifyIFormatProvider", MessageId = "System.Int32.ToString")]
        public override bool OnBeforeActions(object currentValue, out object newValue)
        {
            newValue = null;

            if((currentValue == null) && (this.ExecutionStage != Stage.OnBeginRecipe))
            {
                newValue = (DteHelper.FindProjectByName(VisualStudio, this.projectName) == null);

                return true;
            }

            return false;
        }

        /// <summary>
        /// Called when [configure].
        /// </summary>
        /// <param name="attributes">The attributes.</param>
        protected override void OnConfigure(System.Collections.Specialized.StringDictionary attributes)
        {
            if(attributes == null)
                throw new ArgumentNullException("attributes");

            if(attributes.ContainsKey(ProjectName))
            {
                this.projectName = attributes[ProjectName];
            }

        }
    }
}